| Popis: |
Reaction of AlMe 3 or [AlMe 3·py] with the pendant arm OH-funtionalised 1,4,7-triazacyclononane proligands, HL 1 or HL 2, affords the four- and five- coordinate derivatives [Al(L 1)Me 2] 1 or [Al 2(L 2) 2Me 4] 2 in which the pendant alkoxide O-donor and only one macrocycle N-donor is bound to Al; methyl anion abstraction from 1 yields cationic, pentacoordinate [Al(L 1)Me]+ in which L 1 has a tetradentate coordination mode [L 1 = 1-(2-hydroxy-3,5-di- tert-butylbenzyl)-4,7-diisopropyl-l,4,7-triazcyclononane; L 2 = l-(2-hydroxy- 2-methylethyl)-4,7-diisopropyl-1,4,7-triazacyclononane]. |
